Since my wife left me I’ve lost my libido

Since my wife walked out on our 10-year marriage three years ago, I have completely lost any desire to have sex, even though I have been dating some very attractive women. 

I am in my early 40s and am healthy and fit. Will I ever regain my sexual drive?

Well I really do hope so, because nice, genuinely single guys in their early 40s are a rare breed.